Air-control device



May www. P. P. FE1-r I 'Lmz AIR CONTROL DEVICE Filed July 5, 1924 2 sheets-sheet l May 28, 1929. P P- IFE" -AAIR CONTROL DEVICE,

Filed July 5y 1924 2. Sheets-Sheet 2 MFE b A w\\ 4. 7 a@ T M W N H45 fro/mira PAUL P. FEIT, O

Patented May 28, 1929.'

F CANTON, OHIO, ASSIGNOR T THE TIMKEN PANY, OF CANTON, OHIO, A CORPORATION OF OHIO.

An-CONTROL DEVICE.

' form part of this specification, and wherein like reference numerals indicate like parts wherever they occur.

Fig. l'ris a top plan view of an air control device embodying my invention,

Fig. 2 is an elevation thereof, certain parts being shown in vertical section,

Fig. 3 is a vertical sectional view on the line 3 3 of Fig. 1, v

Fig. 4 is a vertical sectional view on the yline H of Fig. 1,

Fig. 5 is a horizontal sectional view on the line 5 5 of Fig. 3,

Fig. 6 is a horizontal sectional view on the line 6,-6 of Fig. 3,

Fig. 7 is a vertical sectional view on the line 7-7 of Fig. 3, and

Fig. 8 is a detail view of the slide valve.

Secured to a suitable frame 1 as by screws V2 andV dowels 3 is a hollow body member 4 in the enlarged bore of which is disposed a piston 5 that is provided with anupwardly extending operating rod 6 and with a downwardly extending slide valve 7 that works in a valve sleeve 8 in the body member 4. Preferably the bore of the body member is provided with a bushing 9 that constitutes the cylinder for the piston l5".

Secured to the body member 4 as by screws 10 is a valve housing 11 that is provided with four air chambers; an air inlet chamber 12 that is provi-ded with an opening into which is threaded the end of a pipe 13 that supplies air to said chamber; a chamber 14 above said chamber and separated therefrom by a partition 15 in which is an opening 16 that may be closed by means of a spring-pressed valve 17; a chamber 18 that has an opening into which is threaded a pipe'lf) that leadsto the cylinder C of the burnishing machine or the like that Operates the burnishing tool T for burnishing a roller bearingcone W or the Application'led July 5, 1924. Serial No. 724,535.

like; and a chamber 20 that is separated from said cylinder supply chamber 18 by a partition 21 in which is an opening 22 that may be closed by a spring-pressed valve 23 and is also provided with an exhaust pipe 24.

' The body member 4 is provided with two air chambers; a chamber 25 that is in direct Comunication with said second chamber 14 of the valve housing through a passageway 25a and a second chamber 26 that may be connected with said chamber by means of Valve mechanism hereinafter described. Said second chamber 26 in said body member is in direct communication with the cylinder supply chamber 18 of said Valve housing 11 through a passageway 26a. Said second chamber 26 is also in communication by means ofa bleed opening 27 with the lower end of the cylinder 9 in which the piston 5 works. The size of said bleed opening may be controlled by a needle valve 28.

The valve 17 that controls the opening between the air inlet chamber 12 and the second chamber 14 of the valve housing 11 is mounted at the lower end of a stem 29 that projects upwardly through the top of the housing 11. The valve 17is normally held against its seat by means of 'a spring 30 that is `interposed between the end of the valve 17 and a cap 31 that is threaded into the valve housing 11. The stem 29 of the valve 17 is provided with a pluralit of oil grooves 32, so that a seal is forme to prevent the escape of air from the air chamber 14.

The exhaust valve 23 of the air chamber 18 (the chamber that supplies air to the cylinder of the burnishing machine) is likewise normally held against its seat by means of a spring 33 interposed between the valve and a cap 34 threaded into the valve hous- 9 ing 11. Said valve is provided with a stem 35 that projects upwardly through the housing and is provided with a plurality of oil grooves 36.

Pivotally secured to the valve housing 11 as by a pin 37 is an operating rod 38 that has two operating arms 39, one for said valve 17 that controls the inlet of air and the ther for said valve 23 that controls the eX- haust of air. Said operating rod 38 is secured to the trame 1 by means of a spring 40 that normally holds the operating rod 38 in such position that the arm that controls the exhaust valve 23 is depressed and holds said valve in its downward position, so that ROLLER BEARING COM- I the machine and from from the cylinder of the cylinder' supply chamber 18 and the exhaust chamber 20 of the valve housing 11;

Pivotally mounted in the frame 1 as by being secured to a pivot rod 41 by a pin 41b is a lever 41 that .is provided with a plurality of weights 42 whereby the torce needed to raise said lever may be varied. The end of said lever 41 works in a slot in a stop memair may exhaust freely ber 43, lwhereby the upward and downward 'movement of the lever is limited.l

The operating rod 38 is moved into position to depress the inlet valve 17 and hold it open by means of a suitable pull rod (not shown in the drawings). Loosely mounted on said pivot 41a is a latch lmember 44 that is adapted to engage a pin 45 on the operating rod 38 to hold it'in this position. A stoppin 44a on said pivot rod 41a engages a stoppin 44b on said latch member 44. Thus saidlatch member may beraised independently of the lever 41 to clear the pin 45, and is raised with said lever 41 by 'means of the pins 44a and 44". o

The sleeve 8 in which the slide valve 7 works constitutesthe partition between the two air chambers 25 and 26 of the body member. Said valve 7 is provided with an annular groove 46 and said sleeve is provided with a lower pair of openings 47 opening respectively into said airchambers 25 and 26 and with an upper pair of openings 48 opening respectively into said air chambers. The lower end of said valve 7 is provided with oil grooves 49 thereby forming an airtight seal for said valve. The lower end of the valve 7 projects into a hollow cap .50

' that is threaded intothebody member.

The upper yend of said piston rod 6 is provided witha slot 51 in which rests a lever -l 52 that is pivotally' secured at one end to the frame 1 and to the other end of which is secured a spring 53 that is also secured 'to a pin 54 on the body member 4. By the pressure ofsaid lever 52 on the top thereof, said piston rod 6 is normally held in its lowermost position and the annular groove 46 of the slide valve 7 registers with the. lower pair of openings 47 in the sleeve 8, so that the air may pass from.4 the chamber 25 of the body ('whichvreceives air from the second chamber 14 of the valve housing 11) to the chamber 26 of the body and from thence to the cylinder supply chamber 18 of the housing 11. A portion of the air entering said chamber 26 passes into the cylinde 9 of thebody member to raise the piston Vertically disposed in the weighted lever 41 is a plunger 55 that has a stem 56 on which is disposed` aicoil spring 57 and that has an enlarged portion 58 which prevents it from dropping out of the lever and which constitutes an abutment for the end of said vlever .52

spring. A housing member 59 for the stem 56 is secured to said lever 41 and is provided with a threaded Acap 60 against which the spring bears. 57 maybe adjustedl by 'turning said cap. The end of said plunger 55 is in line with said lever 52 and is engaged thereby as the piston 5 and lever52 are raised. The resistance of the spring 57 causes the piston 5 and lever 52 to rise more slowly. after said lever engages `the plunger 55.

The operation. of the device is as follows: In the normal positions of the parts, as has been stated, the inlet valve 17 is ciosedand the exhaust valve 23 is open, so that there is no pressure in the air cylinder of the machine. The operating rod 38 is manually moved so as to cause an arm39 thereof to open the inlet valve 17 and to permit the exhaust valve 23 to close. The. operating rod 38 is held in this position by the latch 44. Thus air enters the inlet chamber 12 of the valve housing 11, passes therefrom to the second chamber 14 and to the chamber 25 of the body member,

whence it passes through the openings 47 and the annular groove 46 of the slide valve 7 into the other chamber 26v of the body member and` thence to the cylinder supply chamber 18 of ,the valve housing 11 and to the air cylinder The pressure of thespring and brings the burioo the lower end of the cylinder 9 of the body l member where it causes the piston 5 to rise. As said piston 5 rises, it carries lwith it the slide valve 7, closing said iirst openings 47 `and partly opening the second openings 48.

Thus air continues to flow from the air inlet chamber 12 through the ways above described into the cylinder supply chamber 18a; so that the pressure in said chamber 18 and in the operating cylinder of the machine is at first maintained and then gradually built-up andv the burnishing tool is moved further toward the work. As the piston 5 rises further, the annular groove registers more and more fully with the upper openings 48, thus buildingup the pressure in the cylinder supply chamber 18 and in the operating cylinder.

As the piston 5 and lever 52 rise, thelever presses upwardly against the plunger 55 of the weighted lever 41 and gradually raises it. The continued movement of the piston 5 and causes the outer end of the lever 52 to engage a roller 61 that is secured to thev weighted lever 41'. Whenthe lever 52 is operating both against the plunger 55 and the roller 61 of the weighted lever 41, further movement is prevented until the pressure in the cylinder supply chamber 18 and in the -opening and through p chine to begin operations.

cylinder of the machine and also in the cylinder 9 in which the piston works is built up suiiiciently to overcome the force of lthe weights 42 on the weighted lever 4l. l/Vhcn the pressure is sufficient to overcome this force, the weighted lever 41. is swung upwardly thus withdrawing 'the latch 44 fronrthe pin of the operating rod 38 and permitting said rod to swing to its normal position, in vwhich the inlet valve 17 is closed and the exhaust valve 23 is open. Thus the'pressure of the machine cylinder and ot the cylinder supply chamber is exhausted through the Valve the exhaust chamber of the body member and `the operation of the machine is stopped. Adjustments may be made by regulating the size of the bleed opening, by adjusting the spring on the plunger, iind by adjusting the weights on the weighted ever.

The hereindescribed air control device has numerous advantages. It secures uniformity of treatment ofthe articles being operated on. The pressure is very rapidly built up to a point sutlicient to cause t-he burnishing ma- T he pressure then is very gradually built up in the cylinder supply chamber and in the operating cylinder .of the machine, so that the work of the machine continues and finally when the pressure reaches a maximum, the air supply is exhausted and the operation of the ymachine stopped. The device is automatic, except for the step of setting it in operation. Nothing is left to the judgment of the machine'operator as to the extent of time the machine shall operate or the degree of pressure that is admitted to the machine. Obviously numerous changes may be made without departing from Ythe invention and I do not wish to be limited to the precise construction shown.

lVhatl claim is:

l.y An air control device air supply, an air receiving chamber communicating with said air supply, an inlet valve for controlling the communication between said chamber and said airsupply, a supply chamber for the operating cylinder of a machine, a passageway for air from said receiving chamber to said supply chamber, an exhaust opening in the wall of said supply chamber, an exhaust valve for controlling said exhaust opening, a lever for controlling said inlet`valve and said exhaust valve, means for normally holding said Jlever in such position that the exhaust valve is open and the inlet valve is closed, means for latching said valve in such position that the inlet valve is open and the exhaust valve is closed and means controlled by the pressure in the system for unlatching said lever.

2. An air control device comprising an air receiving chamber, an inlet valve for controlling the admission of air to said receiving chamber, a supply chamber for sup- 'comprising an lthe width of said plying air to the operating cylinder of a `machine, a cylinder communicating with trolling the admission of air to said receiving chamber, a lever for operating said Valve, means for holding said valve operating lever in one position, a supply cham-80 ber :torl supplying air to the operating cylinder of a machine, an intermediate passageway located in the path of the air travcling from said receiving chamber to said supply chamber, a partition in said passageway, a slideA valve in said partition, said valve being provided with an annular groove, and said partition being provided with spaced circular series of openings adapted `to communicate with said groove, a cylinder communicating' with said supply chamber, a piston in said cylinder, said piston being connectedwith said slide valve,` and means actuated by said piston for releasing the holding means for said valve operating lever.

4. An air control device comprising an air receiving chamber, an inlet valve for controlling the admission of air to said receiving chamber, a supply chamber for supplying air tothe operating cylinder of a machine, an intermediate passageway, a pai'- tition in said passageway, a slide valve in said partition, saidvalve being provided with an annular groove, and said partition being provided with spaced sets of openings adapted to communicate with said groove, a cylinder communicating with said supply chamber, a piston in said cylinder, said piston being connected with said slide valve, the distance between the upper and lower sets of openings being slightly less than groove, whereby the upper openings are slightly uncovered before the lower openings are entirely closed, an exhaust valve for said supplyv chamber, means for operating said inlet and exhaust valves, and means actuated by said piston for initiating movement of said valve operating means to close said inlet valve and open said exhaust valve. I

5. An air control device comprising an air receiving chamber, an inlet valve for controlling the admission of air to said receiving chamber, a supply chamber for sup- 12 plying air to the operating cylinder of a machine, an exhaust valve for said supply chamber, an intermediate passageway, a partition in said passageway. a slide valve in said partition, said valve being provided with an annular groove, and said partition being provided with spaced sets of openings adapted to communicate with said groove,- whereby when the groove is in communication with the openings of either set, air may pass from the receiving chamber through trolling the admission of air to said receiving chamber, a supply chamber for supplying air to the operating cylinder of a machine, an

. exhaust valve in said supplyy chamber, 'a lever y saidpassageway,

said valve being provided with an annularfor operating said inlet and exhaust valves, an intermediate passageway, `a partition in aslidevalvein said partition,

groove, and said partition being provided with a passageway for -valve and mally'holding said lever in spaced sets of openings adapted to communicate with said groove whereby when either set of openings is in communication with said groove, air may pass throughsaid intermediate passageway into said supply chamber, a cylinder communicating with said supply chamber, a piston in said cylinder, said piston being connected with said slide valve, and means operated by said piston for initiating movement of said valve operating lever.

7. In an air control device, an air receiving chamber, an inlet valve for controlling the admission of air to`said receiving chamber, a supply chamber communicating with said receiving chamber, an exhaust valve for sai'd supply chamber, a lever for operating said valves, means for latching said valve operating lever in position so that the inlet s valve is open and the exhaust valve is closed,

a cylinder communicating with said supply chamber, a piston in said cylinder and adapted to be raised as the'pressure is increased, and means operated by said piston for unlatching said valve operating lever.

8. An air control device comprising an air supply, an air receiving chamber communicating with said air supply, an inlet valve for controlling the communication between lsaid chamber and said air supply, a supply chamber for the operating cylinder of a machine, air from said receiving chamber to said sppply chamber, an exhaust opening in the wall of said supply chamber, an exhaust valve for controlling said exhaust opening, a lever for controlling said inlet said exhaust valve, means for noisuch position that the exhaust valve is open and the inlet valve is closed, means for latching said valve in such 'osition that the inlet valve is open and the exhaust valve is closed, a cylinder communieating with said supply chamber, a piston in said cylinder and adapted to be raised as the pressure is increased, and means operated by said piston for unlatching said valve operating lever.

9. An air control device comprising an air v supply, an air receiving chamber communicating with said air supply, an inlet valve for controlling.l the communication between said chamber and said air supply, a supply chamber for the operating cylinder ofL a machine,

a passageway for air from said receiving spring-pressed leverand provided with ad` justable weights, and a latchmember operatively connected with said weighted lever adapted to engage said valve operating lever to hold it in such position that the inlet valve is open, and to be disengaged therefrom when said weighted lever is swung upwardly by said spring-pressed lever. 10. An air control device comprising an air inlet chamber, an air receiving chamber communicating with said inlet chamber, an inlet valve for controlling the communication between said chambers, a supply chamber for the operating cylinder o a machine, 'a passageway for air from said receiving chamber to said supply chamber, an exhaust chamber communicating with said supply chamber, an exhaust valve for controlling the communication between-said exhaust chamber and said supply chamber, a lever for operating said valves, resilient means for normally holding said lever in such position that the inlet valve. is closed and the exhaust valve is open, means for latching said valve operating lever in such position that the linlet valve is open and the exhaust valve is closed means operated by the pressure ofthe air for unlatching said lever, a cylinder communicating with said supply chamber, a piston in said cylinder, a springpressed lever engaging the top of said piston, a lever adapted to be engaged by' said springpressed lever and provided with adjustable weights, said weighted lever having said latching means operatively connected therewith, and a spring-pressed plunger in said weighted lever for engaging the upper edge of said spring-pressed lever.v

' 11. An air control device comprising an air inlet chamber, an' air receiving chamber com-municatingwith said inlet chamber, an inlet valve for controlling the communication said means comprising between said chambers, a supply Achamber 'for supplying air to the operating cylinder of chambers opening into said supply chamber, n `and one of sald intermedlate chambers opening into said air receiving chamber, an exhaust chamber communicating with said supply chamber, a partition between said intermediate chambers, a slide valve in said partition, said valve having an annular groove therein and saidpartition having two sets of holes adapted to communicate with said annular groove, a leyer for operating said inlet and exhaust valves, a spring for normally holding said lever in position so that the inlet valve is closed and the exhaust valve is open, a lever pivoted at one end and provided with adjustable weights, means connected with said weighted lever for latching said valve operating lever,when it is moved into position so that the inlet valve is open and the exhaust valve is closed, a cylinder communicating with said supply chamber through a bleed opening, a piston in said cylinder and connected to said slide valve, a lever pivoted at one end and having a spring secured to the outer end tending tokeep said lever in its lowermost position, said lever resting in a slot provided therefor in the projecting upper end of said piston, and a springpressed plunger projecting from the under- Y side of said weighted lever and adapted to engage the upper edge of said spring-pressed lever.

12. A11 air control device comprising an air inlet chamber, an air receiving chamber communicating with said inlet chamber, an inlet valve for controlling the communication between said chambers, a supply chamber for ,supplying air to the operating cylinder of a burnishing machine or the like, an exhaust chamber, an exhaust valve for controlling the communication between said exhaust chamber and said supply chamber. Intermediate chambers, one of said intermediatel chambers opening into said supply chamber, and one of said intermediate chambers opening into said air receiving chamber, an exhaust chamber communicating with said supply chamber, a partition between said intermediate chambers, a slide valve in said partition, said slide valve having an annular groove therein and said partition having two sets of holes adapted to communicate with said annular groove, a lever for operating said inlet and exhaust valves, a spring for normally holding said lever in position so that the inlet valve is closed and the exhaust valve is open, a lever pivoted at one end and provided with adjustable weights, means connected with said weighted lever'for latching said valve operating lever when it is moved into position so that the inlet valve is open and the exhaust valve is closed, a cylinder communicating with said supply chamber through a bleed-opening, a piston in said cylinder and connected to said slide valve,'a lever pivoted at onelend and havino a spring secured to the outer end tending toi-l lever in its lowermost position, said lever resting in a slot provided therefor in the projecting upper end of said piston, said weighted lever being provided with a roller adapted to be engaged by the outer end of said spring-pressed lever, a spring-pressed plunger' projecting :trom` the underside of said weighted lever and adapted to engage the upper edge of said spring-pressed lever, and means for varying the pressure on said spring-pressed plunger. .j

13. In combination with a'burnishing machine,vor the like comprising a tool anda cylinder for operating the same, an air receiving chamber, an inlet valve for controlling the admis-sion of air to said receiving chamber, a supply chamber for supplying air to said operating cylinder of the machine, an intermediate passageway, a partition in said passageway, a slide valve insaid partition, said. valve being provided with an annular groove, and said partition being provided with spaced sets of openings adapted to communicate with said groove, whereby1 when the groove is in' communication with the openings of either set, air may pass from the receiving chamber through the intermediate passageway and into the supply chamber and means controlled by the air pressure in said cylinder supply chamber for operating said 'slide valve.

14. In combination with a burnishing machine or the like comprising a tool and an air cylinder for operating the same, an air supply, an air receiving chamber communicating with said air supply,'an inlet valve for controlling the communication between said chamber and said supply, asupply chamber for supplying air to said operating cylinder,a passageway for air from said receiving chamber to said supply chamber, a slide valve in said passageway, an exhaust opening in the wall of said supply chamber, an exhaust valve for controlling said exhaust opening, a lever for operating said inlet and exhaust valves, a spring for normally holding said lever in position so that the inlet valve is closed and the exhaust valve is open, means for latching said valve operating lever lwhen itis moved into position so that the inlet valve is open and the ex- {eep said haust lvalve is closed, a cylinder communichamber to said supply chamber,

lever `in its lowermost position, said lever resting in a slot provided therefor in the pro jecting upper end of said piston.

15. In combination with a burnishing machine or the like comprising a tool and any air cylinder for operating the same, an air supply, an air receiving chamber communicating with said air supply, an inlet valve for controlling the communication between said chamber and said supply, a supply chamber for supplying air to said operating cylinder, a passageway for air from said receiving an exhaust opening in the wall of said supply chamber, an exhaust valve for controlling said exhaust opening, a lever for operating said inlet and exhaust valves, a spring for normally holding said lever in position so that the inlet valve is closed and the exhaust valve is open, means for latching said valve operating lever when it is moved into position .so

that the inlet valve is open and the exhaust valve is closed, and means controlled by the pressure in the system for unlatching said lever.

16. An air control device comprising an air supply, an air receiving chamber communicating with said air supply, an in let valve for controlling the communication between said chamber and said air supply7 a supply chamber for the operating y cylinder of a machine, a passageway for air from said receiving chamber to said supply chamber, an exhaust opening in the wall of said supply chamber, an exhaust valve for controlling said exhaust opening, a lever for controlling said inlet valve and said exhaust lvalve, means for normally holding said lever in such position that the exhaust valve is open and the inlet valve is closed, a cylinder coinmunicating with said supply chamber, a piston Jin said cylinder, a spring pressed lever engaging the top of said piston, a lever secured to a pivotally mounted rod and provided with Weights, said weighted lever being adapted to be engaged by said spring pressed lever, a latch member loosely mounted on said pivot rod of said weighted lever, a pin secured to said pivot rod and a pin secured to said latch member, said latch member being adapt- -ed to engage said valve operating lever to hold it in such position that the inlet valve is open, and said latch member being disengaged from said'valve operating lever by means of the engagement of said pins when said weighted lever is swung upwardly b said spring pressed lever.

17. An air control device comprising an air supply, an air receiving chamber communicating with said air supply, .an inlet valve for controlling the communication between said chamber and said air supply, a supply chamber for the operating cylinder of a machine, a passageway for air from said exhaust opening, a lever for controlling said inlet valve and said exhaust valve, means for normally holding said lever in such position that the exhaust valve is open and the inlet valve is closed, a cylinder communicating with said supply chamber, a piston in said cylinder, a spring pressed lever engaging the top of said piston, a lever secured to a pivotally mounted rod and provided with weights, a contact roller on said weighted lever adapted to beA engaged by said spring pressed lever, a latch member loosely mounted on said pivot rod of said weighted lever, a pin secured to said pivot rod and a pin secured to said latch member, said latch member being adapted to engage said valve operating lever to hold 'it in such position that the inlet valve is open, and said latch member being disengaged from said valve operating lever by means of the engagement of said pins when said weighted ever isfswung upwardly by said spring pressed lever.

18,. An air control device comprising an air supply, an air receiving chamber communicating with said" air supply, an inlet valve for controlling the communication between said chamber and said air supply," a supply chamber for the operating Icylinder of a machine, a passageway for airifrom said receiving chamber to said supply chamber, an exhaust opening in the wall of said supply chamber, an exhaust valve for controlling said exhaust opening, a lever for controlling said inlet valve and said exhaust valve,means for normally holding said lever in such position that thc exhaust valve is open and the inletvalve is closed, -a cylinder communicatino' with saidsupply chamber, a piston in said cy inder, a spring pressed lever engaging the top of said piston, a lever secured to a pivotally mounted rod and provided with Weights, a spring pressed plunger projecting from the bottom of said weighted lever, a contact roller 4secured to the underside of said Weighted that the inlet valve is open, and said latch memberbeing disengaged from said valve operating lever by means ofthe engagement of said pins when said weighted 'lever is swung upwardly by said spring pressed lever.

Signed at Canton, Ohio, this 30th day of June, 1924.- l

PAL P. Farr,

a latch member loosely 

